EFFECTS OF MASS TRANSFER AND CHEMICAL NONEQUILIBRIUM ON SLENDER BLUNTED CONE PRESSURE AND HEAT-TRANSFER DISTRIBUTIONS AT M = 13.2

Abstract

The effects on the pressure and heat-transfer distributions of injecting helium and argon into an air laminar boundary layer over a spherically blunted 7.5-deg half-angle cone at M = 13.2 and Re/in. = 1520 were considered. Calculations are presented for a binary perfect gas boundary layer including transverse curvature and displacement effects, an ionizing air nonequilibrium boundary layer without higher-order effects, and a nonequilibrium stagnation point thin viscous shock layer model. The effects of inviscid chemical equilibrium and nonequilibrium external conditions and wall catalyticity were investigated. Neglecting all higher-order effects, comparison of binary gas and ionizing air boundary-layer results showed reasonable agreement. Strong effects of inviscid chemical nonequilibrium on stagnation point heat transfer were found. Arguments are given for using inviscid nonequilibrium stagnation conditions rather than the usual chemical equilibrium conditions for nonequilibrium boundary-layer calculations.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1968
Accession Number
AD0680395

Entities

People

  • Clark H. Lewis
  • G. E. Gilley
  • J. C. Adams

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Boundary Layer Flow
  • Chemical Equilibrium
  • Chemical Reaction Properties
  • Chemical Reactions
  • Energy Transfer
  • Flow Fields
  • Gas Flow
  • Geometry
  • Heat Transfer
  • Inviscid Flow
  • Laminar Boundary Layer
  • Nonequilibrium Flow
  • Pressure Distribution
  • Stagnation Point
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Combustion science or combustion engineering.
  • Fluid Dynamics.